为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
- 【TiDB 版本】：tidb4.0 RC
- 【问题描述】： 通过jmeter3.0对表LINEITEM在进行20000个写操作，同时对表进行10000个读操作。CPU的使用已经是WAIT状态了，如下
[2020/05/26 09:52:30.249 -04:00] [WARN] [retry_interceptor.go:61] [“retrying of unary invoker failed”] [target=endpoint://client-6b07415a-7392-454b-9595-92644577fce2/192.168.10.126:2379] [attempt=0] [error=“rpc error: code = DeadlineExceeded desc = context deadline exceeded”]
{“level”:“warn”,“ts”:“2020-05-26T09:52:30.615-0400”,“caller”:“clientv3/retry_interceptor.go:61”,“msg”:“retrying of unary invoker failed”,“target”:“endpoint://client-8f7cba90-d33f-40bb-ad74-4ea0e3c1dd71/192.168.10.126:2379”,“attempt”:0,“error”:“rpc error: code = DeadlineExceeded desc = context deadline exceeded”}
[2020/05/26 09:52:31.449 -04:00] [WARN] [retry_interceptor.go:61] [“retrying of unary invoker failed”] [target=endpoint://client-6b07415a-7392-454b-9595-92644577fce2/192.168.10.126:2379] [attempt=0] [error=“rpc error: code = DeadlineExceeded desc = context deadline exceeded”]
[2020/05/26 09:52:32.649 -04:00] [WARN] [retry_interceptor.go:61] [“retrying of unary invoker failed”] [target=endpoint://client-6b07415a-7392-454b-9595-92644577fce2/192.168.10.126:2379] [attempt=0] [error=“rpc error: code = DeadlineExceeded desc = context deadline exceeded”]
[2020/05/26 09:52:33.850 -04:00] [WARN] [retry_interceptor.go:61] [“retrying of unary invoker failed”] [target=endpoint://client-6b07415a-7392-454b-9595-92644577fce2/192.168.10.126:2379] [attempt=0] [error=“rpc error: code = DeadlineExceeded desc = context deadline exceeded”]
[2020/05/26 09:52:35.050 -04:00] [WARN] [retry_interceptor.go:61] [“retrying of unary invoker failed”] [target=endpoint://client-6b07415a-7392-454b-9595-92644577fce2/192.168.10.126:2379] [attempt=0] [error=“rpc error: code = DeadlineExceeded desc = context deadline exceeded”]
{“level”:“warn”,“ts”:“2020-05-26T09:52:40.083-0400”,“caller”:“clientv3/retry_interceptor.go:61”,“msg”:“retrying of unary invoker failed”,“target”:“endpoint://client-8f7cba90-d33f-40bb-ad74-4ea0e3c1dd71/192.168.10.126:2379”,“attempt”:0,“error”:“rpc error: code = DeadlineExceeded desc = context deadline exceeded”}
{“level”:“warn”,“ts”:“2020-05-26T09:52:40.616-0400”,“caller”:“clientv3/retry_interceptor.go:61”,“msg”:“retrying of unary invoker failed”,“target”:“endpoint://client-8f7cba90-d33f-40bb-ad74-4ea0e3c1dd71/192.168.10.126:2379”,“attempt”:0,“error”:“rpc error: code = DeadlineExceeded desc = context deadline exceeded”}
{“level”:“warn”,“ts”:“2020-05-26T09:52:41.718-0400”,“caller”:“clientv3/retry_interceptor.go:61”,“msg”:“retrying of unary invoker failed”,“target”:“endpoint://client-8f7cba90-d33f-40bb-ad74-4ea0e3c1dd71/192.168.10.126:2379”,“attempt”:0,“error”:“rpc error: code = DeadlineExceeded desc = context deadline exceeded”}